Petroleum Goodies: Neutron Porosity |
| Posted: 24 Apr 2011 10:00 AM PDT Neutron Porosity: Referring to a log of porosity primarily based on the impact of the formation on fast neutrons released by a source. Hydrogen provides by far the main effect in reducing and acquiring neutrons. Since hydrogen can be found primarily in the pore fluids, the neutron porosity log responds principally to porosity. Yet, the matrix and the type of fluid have also an effect. The log is usually adjusted to read the right porosity assuming that the pores are filled up with fresh water and for a particular matrix (limestone, sandstone or dolomite). It is presented in units of porosity (vol/vol) for the matrix selected. The depth of investigation is several inches, so that the log measures primarily in the flushed zone. Commonly used in formation evaluation and logging. Similar Posts: |
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